NVMe x4 adapter card for PCIe x1 slot

You can place a PCIe 1x card into any available PCIe slot and it will work

slot x1 228022110 NVMe SSD slot x1 228022110 NVMe SSD slot x1 Memory expansion 1* PCIe x16

x16 slot PCIe x1: This is the smallest PCIe slot and has a single lane for data communication PCIe x1 slots are often used for less demanding expansion cards, such as

x1 slot X1 X3 X2 X4 14 15 16 17 18 19 20 21 22 23 24 FortiGate 200F POWER HA ALARM slots, NP6XLite and CP9 hardware accelerated FortiGate 201F FG-